Skyscraper
Adventurer
Question: If the creature attacks the ally with a ranged power and the ally shifts to an adjacent square to the enemy, does the ally make OA?
I would say yes.
I think that the argument that the attack has occurred but not the hit, is unfounded. There is nothing in the rules to support that the attack and a hit (or the attack and a miss) are two different sequentially occurring events and that while the attack still occurred, only the hit could be interrupted. A hit is an attack that successfully damages an opponent, but it's still one and the same event IMO even if, at the game table, we sequentially roll two dice.
So in the end, the warlord would indeed move an ally next to his opponent who, by using a ranged power, would provoke an OA. I don't see any far-reaching consequences to ruling this power in this way, you simply give an ally a basic attack in some circumstances (ranged attack from opponent, ally is within a few squares from opponent) while other warlord powers give basic attacks to ally in any circumstance. The benefit of this power is that you both move your ally in addition to him eventually benefitting from an OA if the circumstances are appropriate.
Sky